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Related Experiment Video

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High-Accuracy, Compact Scanning Method and Circuit for Resistive Sensor Arrays.

Jong-Seok Kim1, Dae-Yong Kwon2, Byong-Deok Choi3

  • 1Department of Electronic Engineering, Hanyang University, 222 Wangsimni-ro, Deongdong-gu, Seoul 04763, Korea. jskim383@hanyang.ac.kr.

Sensors (Basel, Switzerland)
|January 29, 2016
PubMed
Summary

A new zero-potential scanning circuit using a single operational amplifier significantly reduces read-out errors in resistive sensor arrays. This innovation overcomes limitations of digital buffer and multi-operational amplifier designs, improving accuracy and simplifying systems.

Keywords:
crosstalkread-out circuitresistive sensorrow driversensor array

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Area of Science:

  • Electrical Engineering
  • Sensor Technology
  • Circuit Design

Background:

  • Zero-potential scanning circuits are crucial for resistive sensor arrays, mitigating crosstalk.
  • Existing row driver designs, using digital buffers or multiple operational amplifiers, present trade-offs between accuracy, cost, and complexity.

Purpose of the Study:

  • To develop a novel row driver for zero-potential scanning circuits that enhances accuracy and reduces system complexity.
  • To address the read-out errors caused by digital buffer on-resistance and the high component count of operational amplifier-based drivers.

Main Methods:

  • Proposed a new row driver architecture utilizing a single operational amplifier to drive all rows of a sensor array.
  • Implemented and tested the proposed circuit with a 4x4 resistor array to evaluate its performance.

Main Results:

  • The proposed single operational amplifier row driver achieved a maximum error of only 0.1% in a 4x4 resistor array.
  • This represents a significant reduction in error compared to previous designs, which exhibited up to 30.7% error.

Conclusions:

  • The novel single operational amplifier row driver effectively resolves accuracy and complexity issues in zero-potential scanning circuits.
  • This approach offers a highly accurate and simplified solution for reading resistive sensor arrays.